Gas-burner



E. D. LELAND.

GASBURNER.

APPLICATION FILED APR.18. 1918.

'1 $22,249. Patented Nov. 18, 1919.

INVENTOR UNITED STATES PATENT OFFICE.

EDWARD D. LELAND, 0F PITTSBURGH, PENNSYLVANIA. ASSIGNOR 0F ONE-HALF T0FRITZ UHLENHAUT, J 3., OF PITTSBURGH, PENNSYLVANIA.

GAS-BURNER.

Specification of ltetters Patent.

Patented Nov. 18, 1919.

Application filed April 18, 1918. Serial No. 229,276.

To all 'wliom it may concern:

Be it known that I, EDWARD D. LELAND, a citizen of the United States,and resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Gas-Burners;and I do hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to an improvement in gas burners for use underboilers, heating furnaces, etc.

' The object of my invention is to provide a burner which makes. itfeasible to burn gas efliciently under various conditions of draft, andalso where the gas is delivered to the burner under either a highpressure as, for example, forty pounds per square inch-or under avery'low pressure-as, for example, one inch of water pressure. The

difficulty with most gas burners now in use is that when the gaspressure is low and the draft is poor, there is danger of the gasigniting near the mixer, and injuring the burner. If, in order toprevent this trouble, excess or secondary air is used to protect theburner, 10 of efliciency is the result. By my invention no excess air isneeded to protect the burner, as there is no danger of the igniting gasinjuring the burner.

To these ends my invention comprises the novel features hereinafter setforth and claimed.

In the accompanying drawing, Figure 1 is a sectional view of a portionof a boiler v furnace showing my improved burner applied thereto; Fig. 2is an enlarged face view of a portion of the furnace front showing theshutter removed; Fig. 3 is an enlarged sectional view of the front endof the furnace showing my improved burner in position; Fig. 4 is asection on the line 4=.4:, Fig. 3; and Fig. 5 is a detail of theshutter-plates.

In the drawing, the numeral 2 indicates a common form of boiler furnacewith the or perforations 7 may be of any suita 1e gas pressures they arepreferably provided With curved or spiral vanes or blades 8, said vanesor blades being likewise formed of some refractory material. The purposeof these plates or vanes is to give the inflowing a1r a swirling motion,which hastens its mixing with the gas delivered to said passages. I

Located in front of the furnace is the box or casing 9, which is formedof cast or wrought iron, connected up to the supplypipe 10, a valve 11being provided to control the supply of gas to the burner.

Projecting from the box 9 are the pipes- 12, which pipes deliver gas tothe passages 7.

In order to regulate or control the supply of air to the burner,Iprovide shutter-plates 13 and 14. The shutter-plate 13 has 'theopenings 15 which register with the passages 7 and through which thepipes 12 extend into said passages. The outer. shutter-plate 14 ismovable and is provided with the openings 16, which register with theopenings 15 ofth movable plate 13.

The bolts 17 extending into the furnacewall serve to hold theshutter-plates in position and slots 17 are provided to allow for themovement of said plates.

The outer movable shutter-plate 14 has the slot '18 through which thestud 19 on the inner plate projects. The outer plate has the stud 19*. Alever 19 is pivoted on the bolt 17" and said lever is connected to thethat when one plate is moved over the other,

the air inlet may be cut down to the shape indicated in Fig. 5. By theuse of these shutter-plates, the amount of air admitted is readilycontrolled, but even without said shutter, highly efiicient results areobtained with my improved burner. Any other suitable method ofcontrolling the admission of air may be employed.

When my improved burner is in use, the gas admitted. by the pipes 12enters the passages 7, and the air entering the openings is given awhirling motion, which tends to expedite its mixture with the gas in themixing plate so that when the gas reaches the point of ignition withinthe furnace, better combustion is obtained, and the supply of air may beso regulated as to give efiicient results under various conditions ofdraft, as

Well as incases where the gas is delivered either under a high or lowpressure.

What I claim is 1. In a gas burner, the combination with a furnace Wall,of a refractory mixing-plate the combustion takes place at the dischargeends of said passages.

2. In agas burner, the combination with a furnace wall, of a refractorymixing-plate set therein having mixing passages extending through itwith open outer ends communicating directly with the atmosphere wherebyall the air for mixing and combustion enters said open ended passages,individual gas pipes extending into said passages, and a shutterarranged so as to control simultaneously the supply of air directed fromthe atmosphere to each individual mixing passage whereby the combustiontakes place.

at the discharge ends of said passage.

3. In a gas burner, the combination with a furnace wall, of a refractorymixing-plate set therein having a'plurality of mixing passages extendingthrough, it with open outer ends communicating directly with theatmosphere, individual gas pipes extending into said passages, movableshutter-plates having openings through which said pipes extend, andmeans for moving said plates in opposite directions for controlling thesupply of air to said mixing passages.

In testimony whereof, I, the said EDWARD D. LELAND, have hereunto set myhand.

EDWARD D. LELAND.

Witnesses:

Rom. D. TO'ITEN, Joan F. WILL.

